Uniden PRO520XL User Manual

PRO 520

XL

Professional

Mobile CB Radio

Replacement or substitution of crystals,
transistors, IC’s, regulator diodes or
any other part of a unique nature, with
parts other than those recommended
by Uniden, may cause violation of the
technical regulations of Part 95 of the
FCC rules or violation of type
acceptance requirements of Part 2 of
the rules.

Elimination of Licensing

The FCC has ruled that CB Radio
Service operators are not required to
obtain an FCC license to operate the
CB equipment.The FCC also permits
CB station operation without station
identification.

Elimination of individual station
licenses results in no lessening of the
operating privileges or responsibilities
of CB users. An operator of an CB
radio station is still required to comply
with the Communications Act and with
the rules of CB Radio Service.

Welcome to the world of Citizens Band
radio communications.Your Uniden
PRO 520XL is an advanced mobile
radio designed for use in the Citizens
Band Radio service. It will operate on
any of the 40 AM frequencies
authorized by the Federal
Communications Commission (FCC).
Your PRO 520XL features a
superheterodyne circuit with PHASE
LOCKED LOOP techniques to assure
precise frequency control.This radio
has been type accepted and certified
by the FCC.

WARNING

The Citizens Band (CB) Radio Service
is under the jurisdiction of the FCC.
Any adjustments or alterations which
would alter the performance of the
transceiver’s or iginal FCC type
acceptance or would change the
frequency determining method, are
strictly prohibited.

INTRODUCTION

INCLUDED IN YOUR PACKAGE

CB Radio Microphone

Mounting Bracket

Other Printed Material

Antenna must be purchased separately.

Mounting Hardware

If any of these item are missing or damaged, immediately contact your place of
purchase or Uniden Customer Service at: [phone], 8:30 a.m. to 5:00 p.m.,
Central Time, Monday through Friday.

1. PA Switch - Select the Public Address
mode when an external PA speaker is
connected.When the PA mode is
selected, the CB radio will be disabled.
Adjust the PA output level by rotating
the volume control.

2. ANL Switch - You can select the
Automatic Noise Limiter to help reduce
harsh background noise caused by a
variety of interference sources.

3. Instant CH 9 Switch - Use this switch
to override the main channel selector
and instantly tune to the emergency
channel 9. Switch back to return to
normal 40 channel operation.

4. TX LED - An LED lights to indicate
when the radio is transmitting.

5. S/RF Meter - This LED meter shows the
relative strength of the received signal
or the RF output.

6. Channel Indicator - Displays the
channel currently in use.

7. Channel Selector - This switch selects
the desired channel fortransmission and
reception. All channels, except channel
9, may be used for communications
between stations operating under
different license.Channel 9 has been
reserved by the FCC for emergency
communications involving the
immediate safety of individuals or the
immediate protection of property.
Channel 9 also may be used to
render assistance to a motorist. This

is a FCC rule and applies to all
operators of CB radios.

8. RF Gain - This control is used to adjust
the signal reception in areas where
strong signals are present.Turn the
control clockwise for maximum
reception.

9. Squelch - The squelch control is
used to eliminate background noise
during the absence of a transmission.
Turn the control fully counterclockwise,
then slowly rotate it back clockwise until
the noise disappears. At this setting any
transmission must be slightly stronger
than the background noise to “Break
Squelch” or to be heard. Further
clockwise rotation will increase the
threshold at which a signal will be
heard.You can select any level to
“Break Squelch.”

10. Volume Control - Rotate clockwise to
turn the radio on and to increase
the volume.

11. Microphone Jack- The operational
mode of the CB is controlled by the
push-to-talk switch on the microphone.
Press the switch to activate the
transmitter and disable the receiver.
Release the switch to enable the
receiver and disable the transmitter.
When transmitting, hold the microphone
about 2 inches from your mouth and
speak clearly in a normal voice.The
microphone included with the
PRO 520

XL is detachable electret type.

Antenna Connector - This female
connector permits connection of the trans­mission line cable male connector (PL-259)
to the transceiver.

Public Address - An external 8 ohm 7-watt
speaker must be connected to the “PA SP”
jack located on the back of the unit.The
speaker must be directed away from the
mic to prevent feedback.

External Speaker - The exter nal speaker
jack is used for remote receiver monitoring.
The external speaker should have an 8
ohm impedance and be rated at least 7
watts.When an external speaker is
connected, the internal speaker is disabled.

CONTROLS AN